Improves #106. This more clearly marks the original MultiMC contributors,
and now correctly hides the "Build Platform" if this is set as empty. The
version label is now moved under the "PolyMC" title so it looks just a
little bit better (and matches other applications). The copyright on the
"About" page now correctly attributes the MultiMC contributors just like on
the "License" page.
Closes: #22
Update to 1.0.5
Remove "Forking/Redistribution" tab in About (why is it even there?)
Metainfo now corresponds to version
add discord
Completely removed Patreon.
